Re: [PATCH 2/2] IB/iser: set max_segment_size

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On 04/12/2016 07:13 AM, Christoph Hellwig wrote:
So that we don't overflow the number of MR segments allocated because
we have to split on SGL segment into multiple MR segments.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
  drivers/infiniband/ulp/iser/iscsi_iser.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 80b6bed..dc55950 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -623,6 +623,7 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep,
  	shost->max_id = 0;
  	shost->max_channel = 0;
  	shost->max_cmd_len = 16;
+	shost->max_segment_size = SIZE_4K;

  	/*
  	 * older userspace tools (before 2.0-870) did not pass us

Hello Christoph,

ib_sg_to_pages() can handle segments that are larger than mr->page_size. Have you considered to set queue_limits.max_hw_sectors instead of max_segment_size?

Thanks,

Bart.
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